EXHIBIT 32.2



                      Chief Executive Officer Certification
           Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to
                  Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Annual Report of Steel Dynamics, Inc. (the "Company") on
Form 10-K for the year ended December 31, 2003, as filed with the Securities and
Exchange Commission on the date hereof (the "Report"), the undersigned, Tracy L.
Shellabarger, Vice President and Chief Financial Officer of the Company,
certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section
906 of the Sarbanes-Oxley Act of 2002, that:

     1.   The Report fully complies with the requirements of section 13(a) or
          15(d) of the Securities Exchange Act of 1934; and

     2.   The information contained in the Report fairly presents, in all
          material respects, the financial condition and results of operations
          of the Company.



                                 /S/ TRACY L. SHELLABARGER
                                 ----------------------------------------------
                                 Tracy L. Shellabarger
                                 Vice President and Chief Financial Officer
                                 March 12, 2004


A signed original of this written statement required by Section 906 has been
provided to Steel Dynamics, Inc. and will be retained by Steel Dynamics, Inc.
and furnished to the Securities and Exchange Commission or its staff upon
request.